They became rivals because each one wanted more power than the other for example in world war 2 the USA made the atomic bomb which showed the world that the Americans were the most powerful country but after ww2 Russia and USA started a Cold War which lead to the feud between there political views and the start of better technology and the space race
B. the needs of travelers for safety
He did nothing he thought the great depression could fix itself people so poor they colonies of shacks and tents called Hoovervilles
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